Common mode inductors,anowanzo shandiswa mumakomputa achichinja magetsi kusefa zvakajairika magineti emagetsi masaini masaini. Mudhizaini yebhodhi, iyo yakajairwa modhi inductor inotambawo basa reEMI kusefa, iro rinoshandiswa kudzvanya radiation yekunze uye kubuda kwemafungu emagetsi emagetsi anogadzirwa neakakwira-kumhanya chiratidzo mitsara.
Sechikamu chakakosha chezvikamu zvemagineti, inductors inoshandiswa zvakanyanya mumagetsi emagetsi maseketi. Icho chikamu chakakosha kunyanya mumaseketi emagetsi. Senge electromagnetic relays muindasitiri yekudzora michina uye magetsi emagetsi metres (watt-awa mita) mumasisitimu emagetsi. Masefa pakupinza uye kunobuda kunogumira ekuchinja magetsi emagetsi, tuner paTV inogamuchira uye inotapurirana magumo, nezvimwe zvese hazviparadzaniswe kubva kune inductors. Mabasa makuru e-inductors mumagetsi emagetsi ndeaya: kuchengetedza simba, kusefa, kuvhuvhuta, resonance, etc. Mumagetsi emagetsi, sezvo maseketi anobata nekufambisa kwesimba kwemafungu makuru kana kukwirira kwepamusoro, inductors inonyanya "simba remhando" inductors.
Kunyanya nekuti iyo inductor yemagetsi yakasiyana kubva kune diki chiratidzo chekugadzirisa inductor, iyo topology yekuchinja magetsi inosiyana panguva yekugadzira, uye nzira yekugadzira inewo zvayo zvinodiwa, zvichikonzera matambudziko ekugadzira.Inductorsmumaseketi emagetsi emazuva ano anonyanya kushandiswa kusefa, kuchengetedza simba, kufambisa simba, uye simba rekugadzirisa zvinhu. Inductor dhizaini inovhara akawanda maficha eruzivo senge electromagnetic theory, magineti zvinhu, uye mitemo yekuchengetedza. Vagadziri vanofanirwa kuve nekunzwisisa kwakajeka kwemamiriro ekushanda uye zvinoenderana nezvinodiwa parameter (sezvino, voltage, frequency, kukwira kwekushisa, zvinhu zvemukati, nezvimwewo) kuita sarudzo. Iyo yakanyanya kunzwisisika dhizaini.
Classification of inductors:
Inductors inogona kukamurwa kuva mhando dzakasiyana zvichienderana nemamiriro avo ekushandisa, chimiro chechigadzirwa, chimiro, kushandiswa, nezvimwewo. Kazhinji, inductor dhizaini inotanga nekushandiswa uye nharaunda yekushandisa senzvimbo yekutanga. Mukuchinja magetsi emagetsi, inductors inogona kukamurwa kuita:
Normal Mode Choke
Simba Factor Kururamisa - PFC Choke
Muchinjikwa-wakabatanidzwa wakabatanidzwa inductor (Coupler Choke)
Simba rekuchengetedza rinotsvedza inductor (Smooth Choke)
Magnetic amplifier coil (MAG AMP Coil)
Yakajairwa modhi mafirita inductors inoda kuti macoil maviri ave neakaenzana inductance kukosha, iyo impedance yakafanana, nezvimwe, saka iyi mhando yemainductors inotora symmetrical dhizaini, uye maumbirwo awo anonyanya kuve TOROID, UU, ET uye mamwe maumbirwo.
Mashandiro akajairika mode inductors:
Yakajairwa modhi sefa inductor inodaidzwa zvakare kuti common mode choke coil (inozozivikanwa seyakajairika mode inductor kana CMMChoke) kana Line Filter.
Yakajairwa modhi mafirita inductors inoda kuti macoil maviri ave neakaenzana inductance kukosha, iyo impedance yakafanana, nezvimwe, saka iyi mhando yemainductors inotora symmetrical dhizaini, uye maumbirwo awo anonyanya kuve TOROID, UU, ET uye mamwe maumbirwo.
Mashandiro akajairika mode inductors:
Yakajairwa modhi sefa inductor inodaidzwa zvakare kuti common mode choke coil (inozozivikanwa seyakajairika mode inductor kana CMMChoke) kana Line Filter.
Mukushandura magetsi, nekuda kwekukurumidza kuchinja mune yazvino kana voltage mune rectifier diode, sefa capacitor uye inductor, electromagnetic interference sources (ruzha) inogadzirwa. Panguva imwecheteyo, kune zvakare yakakwirira-yakarongeka harmonic ruzha kunze kweiyo frequency yemagetsi mumagetsi ekuisa. Kana izvi zvinokanganisa zvikasabviswa, Kudzvanya kunokonzeresa kukuvadza kurodha michina kana switching magetsi pachayo. Naizvozvo, masangano anodzora kuchengetedza munyika dzinoverengeka akapa mirairo pamagetsi emagetsi kupindira (EMI) emissions.
zvinoenderana nemitemo yekudzora. Parizvino, kuchinjika frequency yekuchinja magetsi kuri kuramba kuchikwira, uye EMI iri kuramba ichiwedzera. Naizvozvo, EMI mafirita anofanirwa kuiswa mukuchinja magetsi emagetsi. Iwo EMI mafirita anofanirwa kudzvanya ese akajairwa modhi uye yakajairika modhi ruzha kuzadzisa zvimwe zvinodiwa. standard. Iyo yakajairwa modhi sefa ine basa rekusefa iyo yekusiyanisa modhi yekukanganisa chiratidzo pakati pemitsara miviri painopinza kana yekubuda kunopera, uye yakajairika modhi sefa ine basa rekusefa iyo yakajairika modhi yekukanganisa chiratidzo pakati pemitsara miviri yekupinza. Actual common mode inductors inogona kukamurwa kuva marudzi matatu: AC CM.M.CHOKE; DC CM.M.CHOKE uye SIGNAL CM.M.CHOKE nekuda kwenzvimbo dzakasiyana dzekushanda. Dzinofanirwa kusiyaniswa pakugadzira kana kusarudza. Asi misimboti yayo yekushanda yakangofanana, sezvakaratidzwa mumufananidzo (1):
Sezvinoratidzwa mumufananidzo, maviri seti emakoiri ane mativi akasiyana anokuvadzwa pane imwecheteyo magineti mhete. Zvinoenderana nerudyi-rudyi spiral chubhu mutemo, kana inosiyanisa modhi voltage ine yakatarisana polarity uye yakafanana chiratidzo amplitude inoiswa kune inopinza terminals A uye B, Kana , pane yazvino i2 inoratidzwa mumutsara wakasimba, uye magineti flux. Φ2 inoratidzwa mumutsara wakasimba inogadzirwa mune magnetic core. Chero bedzi iwo mahwindi maviri akanyatsoenderana, iwo magineti anoyerera mumativi maviri akasiyana mune magineti musimboti anodzima mumwe nemumwe kunze. Iyo yakazara magineti flux ndeye zero, iyo coil inductance ingangoita zero, uye hapana impedance mhedzisiro pane yakajairika modhi chiratidzo. Kana chiratidzo chemodhi yakajairika ine polarity yakafanana uye amplitude yakaenzana ikaiswa kumatemisheni ekuisa A uye B, pachava neino i1 inoratidzwa neine doti mutsara, uye magineti flux Φ1 inoratidzwa neine doti mutsara ichagadzirwa mune iyo magineti. musimboti, ipapo magineti flux ari musimboti zvichaita Vane nhungamiro imwe uye kusimbisa mumwe nomumwe, kuitira kuti inductance kukosha imwe neimwe coil kaviri kuti kana iripo chete, uye XL = ωL. Naizvozvo, iyo coil yeiyi nzira yekumonereka ine simba rekudzvinyirira mhedzisiro pane yakajairika mode kupindira.
Iyo chaiyo EMI sefa inoumbwa neL uye C. Paunenge uchigadzira, nzira yekusiyanisa uye yakajairika maitiro ekudzvinyirira maseketi anowanzo kusanganiswa (sezvinoratidzwa muFigure 2). Naizvozvo, dhizaini inofanirwa kuve yakavakirwa pahukuru hwesefa capacitor uye inodiwa kuchengetedza mitemo. Mitemo inoita sarudzo pane inductor tsika.
Mumufananidzo, L1, L2, uye C1 inoumba yakajairwa modhi sefa, uye L3, C2, uye C3 inoumba yakajairika modhi sefa.
Dhizaini yeCommon Mode Inductor
Usati wagadzira yakajairwa modhi inductor, tanga watarisa kuti coil inofanirwa kutevedzera zvinotevera misimboti:
1 > Pasi pemamiriro ekushanda akajairika, iyo magnetic core haizoguti nekuda kwesimba rekupa ikozvino.
2 > Inofanira kunge iine impedance yakakura yakakwana ye-high-frequency interference signals, imwe bandwidth, uye zvishoma zvipingamupinyi zvechiratidzo chezvino panguva yekushanda.
3 > Chiyero chekushisa cheinductor chinofanira kuva chiduku, uye capacitance yakagoverwa inofanira kuva duku.
4> DC kushorwa kunofanira kunge kudiki sezvinobvira.
5> Iyo induction inductance inofanira kunge yakakura sezvinobvira, uye inductance kukosha kunoda kugadzikana.
6 > The insulation pakati windings inofanira kusangana kuchengeteka zvinodiwa.
Common mode inductor dhizaini matanho:
Nhanho 0 SPEC kutora: EMI inobvumirwa nhanho, nzvimbo yekushandisa.
Danho 1 Sarudza kukosha kweiyo inductance.
Nhanho 2 Iyo yakakosha zvinhu uye zvakatemwa zvinotemwa.
Nhanho 3 Sarudza huwandu hwematenderedzwa ekutenderera uye waya dhayamita.
Nhanho 4 Kuongorora
Nhanho 5Muedzo
Mienzaniso yekugadzira
Nhanho 0: EMI sefa yedunhu sezvakaratidzwa mumufananidzo 3
CX = 1.0 Uf Cy = 3300PF EMI level: Fcc Kirasi B
Type: Ac Common Mode Choke
Danho 1: Sarudza iyo inductance (L):
Zvinogona kuoneka kubva padhiyagiramu yedunhu kuti iyo yakajairika modhi siginecha inodzvanywa neyakajairwa modhi sefa inoumbwa neL3, C2, uye C3. Muchokwadi, L3, C2, uye C3 inoumba maviri LC akateedzana maseketi, anotora ruzha rweL uye N mitsara zvichiteerana. Chero bedzi iyo yekucheka-kubvisa frequency yesefa yedunhu yakatemwa uye capacitance C ichizivikanwa, iyo inductance L inogona kuwanikwa neinotevera formula.
fo= 1/(2π√LC)L → 1/(2πfo)2C
Kazhinji iyo EMI bvunzo bandwidth yakaita seinotevera:
Kukanganisa kunoitwa: 150KHZ → 30MHZ (Cherechedza: VDE chiyero 10KHZ – 30M)
Kukanganisa kwemwaranzi: 30MHZ 1GHZ
Iyo chaiyo sefa haigone kuwana yakakwira impedance curve yeyakakodzera sefa, uye iyo cutoff frequency inogona kugadzika kutenderedza 50KHZ. Pano, kufungidzira fo = 50KHZ, ipapo
L =1/(2πfo)2C = 1/ [( 2*3.14*50000)2 *3300*10-12] = 3.07mH
L1, L2, uye C1 inoumba (yakaderera-pasi) yakajairika modhi sefa. Iyo capacitance pakati pemitsara ndeye 1.0uF, saka yakajairika modhi inductance ndeye:
L = 1/ [( 2*3.14*50000)2 *1*10-6] = 10.14uH
Nenzira iyi, iyo theoretically inodiwa inductance kukosha inogona kuwanikwa. Kana iwe uchida kuwana yakaderera yekucheka-kubvisa frequency fo, unogona kuwedzera kuwedzera kukosha kweiyo inductance. Iyo yekuchekwa-iyo frequency kazhinji haisi pasi pe10KHZ. Sezvineiwo, iyo yakakwira inductance, zviri nani iyo EMI kudzvanya mhedzisiro, asi yakawandisa yakakwira inductance ichaita kuti cutoff frequency iderere, uye iyo chaiyo sefa inogona kungowana imwe Broadband, izvo zvinoita kuti kudzvanya mhedzisiro ye-high-frequency ruzha iwedzere (kazhinji. Iyo ruzha chikamu cheiyo switching power supply inenge 5 ~ 10MHZ, asi pane zviitiko apo inodarika 10MHZ). Mukuwedzera, iyo yakakwirira inductance, iyo inowedzera kutendeuka kwemhepo ine, kana yakakwirira iyo ui yeCORE, iyo ichaita kuti iyo yakaderera-frequency impedance iwedzere (iyo DCR inova yakakura). Sezvo nhamba yekutendeuka ichiwedzera, iyo yakagoverwa capacitance inowedzerawo (sezvinoratidzwa mumufananidzo 4), ichibvumira ose epamusoro-frequency currents kuti aende kuburikidza ne capacitance iyi. Iyo yakakwira zvakanyanya UI inoita kuti CORE izare nyore, uye zvakare yakaoma zvakanyanya uye inodhura kugadzira.
Nhanho 2 Sarudza CORE zvinhu uye SIZE
Kubva pane zviri pamusoro dhizaini zvinodiwa, tinogona kuziva kuti iyo yakajairika mode inductor inoda kunetsa kugutsa, saka zvinodikanwa kusarudza chinhu chine yakaderera BH angle ratio. Nekuti kukosha kwepamusoro inductance kunodiwa, kukosha kweui kweiyo magineti yakakosha kunofanirwawo kunge kwakakwira, uye inofanirwawo kuve neIine yakaderera musimboti kurasikirwa uye yakakwira Bs kukosha, Mn-Zn ferrite zvinhu CORE parizvino ndiyo inonyanya kukodzera CORE zvinhu zvinosangana pamusoro pezvinodiwa.
Iko hakuna mimwe mitemo paCOEE SIZE panguva yekugadzira. Muchidimbu, inongoda kusangana neinodiwa inductance uye kuderedza ukuru hwechigadzirwa chakagadzirwa mukati meiyo inobvumidzwa yakaderera-frequency kurasikirwa renji.
Nokudaro, CORE zvinhu uye SIZE kubudiswa kunofanira kuongororwa zvichienderana nemutengo, kurasikirwa kunobvumirwa, nzvimbo yekuisa, etc. Iyo inowanzoshandiswa CORE kukosha kwe common mode inductors iri pakati pe2000 ne10000. Iron Powder Core inewo kurasikirwa kwesimbi yakaderera, yakakwirira Bs uye yakaderera. BH angleshi reshiyo, asi ui yayo yakaderera, saka haiwanzo shandiswa mune yakajairika mode inductors, asi iyi mhando yepakati ndeimwe yeakajairwa modhi inductors. Zvaanofarira zvinhu.
Danho rechitatu Sarudza huwandu hwematende N uye dhayamita yewaya dw
Kutanga tarisa zvakatemwa zveCORE. Semuenzaniso, mumuenzaniso uyu, T18*10*7, A10, AL = 8230±30%, zvino:
N = √L / AL = √(3.07*106 ) / (8230*70%) = 23 TS
Iyo dhayamita yewaya inobva pane ikozvino density ye3 ~ 5A/mm2. Kana nzvimbo ichibvumira, huwandu hwemazuva ano hunogona kusarudzwa zvakaderera sezvinobvira. Fungidzira kuti iyo yekupinda ikozvino I = 1.2A mumuenzaniso uyu, tora J = 4 A/mm2
Zvadaro Aw = 1.2 / 4 = 0.3 mm2 Φ0.70 mm
Iyo chaiyo yakajairwa modhi inductor inofanirwa kuyedzwa kuburikidza nemasamples chaiwo kuratidza kuvimbika kwedhizaini, nekuti misiyano mumagadzirirwo ekugadzira inozotungamira kune mutsauko muinductor paramita uye kukanganisa kusefa. Semuenzaniso, kuwedzera kwekugovera capacitance kuchakonzera ruzha rwepamusoro-frequency. Zviri nyore kutamisa. Iyo asymmetry yeaviri mahwindi anoita mutsauko mukupinza pakati pemapoka maviri akakura, achigadzira imwe impedance kune yakajairika modhi chiratidzo.
Pfupisa
1 > Basa reiyo yakajairika mode inductor ndeyekusefa kunze iyo yakajairika modhi ruzha mumutsara. Iyo dhizaini inoda kuti iwo maviri windings ave neyakakwana symmetrical chimiro uye yakafanana magetsi paramita.
2 > Iyo yakagovaniswa capacitance ye common mode inductor ine mhedzisiro yakaipa pakudzvanyirira yakakwira-frequency ruzha uye inofanira kuderedzwa.
3 > Iko inductance kukosha kweiyo common mode inductor ine hukama neruzha frequency bhendi inoda kusefa uye inofananidza capacitance. Iko inductance kukosha inowanzova pakati pe2mH ~ 50 mH.
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